Battery assembly and vehicle

Abstract

The utility model provides a battery assembly and a vehicle, and relates to the technical field of batteries. The battery assembly comprises a shell, a battery cell assembly and a heat management module, the shell is provided with a containing cavity, and the battery cell assembly is arranged in the containing cavity; the heat management module comprises a liquid cooling plate and a liquid cooling connector, the liquid cooling plate is arranged on the bottom side of the shell, and the liquid cooling plate is configured to cool the battery cell assembly; a connecting groove is formed in the side wall of the shell, and the liquid cooling connector is inserted into the connecting groove; the liquid cooling plate is provided with a cold plate connector, and the liquid cooling connector is provided with a circulation opening opposite to the cold plate connector. The cold plate connector is welded to the end face of the circulation opening. The liquid cooling connector is fixed by arranging the connecting groove, and the liquid cooling connector is communicated with the cold plate connector by arranging the mode that the cold plate connector is welded with the circulating opening in the liquid cooling connector, so that the sealing failure points between the liquid cooling connector and the cold plate connector are reduced, and the sealing effect is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery assembly and a vehicle. Background Technology

[0002] New energy vehicles have rapidly become widespread, and electric new energy vehicles consist of three core modules: electric drive, battery, and electronic control. As a crucial core component, the battery pack currently faces increasingly stringent requirements regarding its performance, energy density, and safety.

[0003] In related technologies, the battery assembly of new energy vehicles typically includes components such as a battery casing, cell modules, and a thermal management module. The cell modules are located inside the battery casing, and the thermal management module is used to regulate the operating temperature of the cell modules. The thermal management module includes a liquid cooling plate, a liquid cooling connector, and liquid cooling pipes. The liquid cooling plate has a cold plate connector, and the liquid cooling pipes connect the cold plate connector and the liquid cooling connector.

[0004] However, currently, both ends of the liquid cooling pipe have sealing failure points, resulting in poor sealing performance. Utility Model Content

[0005] This application provides a battery assembly and a vehicle to solve the technical problem of poor sealing at both ends of the liquid cooling pipe in current battery assemblies.

[0006] To achieve the above objectives, this application provides a battery assembly and vehicle, which adopts the following technical solution:

[0007] In a first aspect, this application provides a battery assembly, the battery assembly including a housing, a cell assembly and a thermal management module, the housing having a receiving cavity, the cell assembly being disposed within the receiving cavity; the thermal management module including a liquid cooling plate and a liquid cooling connector, the liquid cooling plate being disposed on the bottom side of the housing, the liquid cooling plate being configured to cool the cell assembly;

[0008] The side wall of the housing is provided with a connecting groove, and the liquid cooling connector is inserted into the connecting groove; the liquid cooling plate has a cold plate connector, and the liquid cooling connector has a flow port opposite to the cold plate connector; the cold plate connector is welded to the end face of the flow port.

[0009] In one possible implementation, the battery assembly provided in this application has a stepped portion on the sidewall of the liquid cooling connector, the stepped portion abutting against the edge of the connecting groove; the edge of the stepped portion is welded to the outer wall of the housing.

[0010] In one possible implementation, the battery assembly provided in this application has a receiving groove on the side of the liquid cooling connector facing the liquid cooling plate, and the edge of the liquid cooling plate has a protrusion located in the receiving groove; the protruding edge is welded to the edge of the receiving groove to form a first weld.

[0011] In one possible implementation, the battery assembly provided in this application has the edge of the liquid cooling plate welded to the edge of the housing to form a second weld; the two ends of the first weld are respectively connected to the second weld and form an annular sealing structure surrounding the circumference of the housing.

[0012] In one possible implementation, the battery assembly provided in this application includes a housing comprising an inner frame and an outer frame, the outer frame being disposed around the outside of the inner frame; the end face of the inner frame facing the liquid cooling plate is lower than the end face of the outer frame facing the liquid cooling plate; and the edge of the liquid cooling plate is recessed onto the end face of the inner frame.

[0013] In one possible implementation, the battery assembly provided in this application includes a first groove and a second groove in the connection groove. The first groove is located on the outer frame, and the second groove is located on the inner frame. The first groove and the second groove are in communication. The liquid cooling connector is inserted into the first groove, and the flow port protrudes into the second groove.

[0014] In one possible implementation, the battery assembly provided in this application has a liquid cooling connector that at least partially protrudes outside the connection groove, and a refrigerant flow pipe is provided on the side of the liquid cooling connector facing the outside of the housing, the refrigerant flow pipe extending away from the housing; the refrigerant flow pipe is connected to the flow port.

[0015] In one possible implementation, the battery assembly provided in this application includes a refrigerant flow pipe comprising a refrigerant inlet pipe and a refrigerant outlet pipe, wherein the refrigerant inlet pipe and the refrigerant outlet pipe are arranged parallel to each other and spaced apart; both the refrigerant inlet pipe and the refrigerant outlet pipe are perpendicular to the side wall of the housing.

[0016] In one possible implementation, the battery assembly provided in this application includes a bottom protective plate connected to the side of the liquid cooling plate opposite to the housing, and the projection of the bottom protective plate in the thickness direction of the housing covers the liquid cooling plate.

[0017] Secondly, this application provides a vehicle including the battery assembly described in the above technical solution.

[0018] This application provides a battery assembly and a vehicle. The battery assembly includes a housing, a cell assembly, and a thermal management module. The housing has a receiving cavity, and the cell assembly is disposed within the receiving cavity. The thermal management module includes a liquid cooling plate and a liquid cooling connector. The liquid cooling plate is disposed on the bottom side of the housing and is configured to cool the cell assembly. A connecting groove is provided on the side wall of the housing, and the liquid cooling connector is inserted into the connecting groove. The liquid cooling plate has a cold plate connector, and the liquid cooling connector has a flow port opposite to the cold plate connector. The end face of the cold plate connector is welded to the end face of the flow port. By setting the connecting groove, the liquid cooling connector is fixed. Then, by welding the cold plate connector to the flow port on the liquid cooling connector, the liquid cooling connector and the cold plate connector are connected and fixed. The welding has a certain degree of sealing, and the sealing of the connection between the liquid cooling connector and the cold plate connector can be achieved without the need for additional sealing components, reducing the sealing failure points between the liquid cooling connector and the cold plate connector and improving the sealing effect.

[0019] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the battery assembly and vehicle provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the battery assembly provided in the embodiments of this application. Figure 1 ;

[0022] Figure 2 A schematic diagram of the battery assembly provided in the embodiments of this application. Figure 2 ;

[0023] Figure 3 for Figure 2 A partial diagram of the exploded structure;

[0024] Figure 4 for Figure 3 Another structural diagram from a different perspective;

[0025] Figure 5 for Figure 4 A partial structural diagram;

[0026] Figure 6 for Figure 4 Schematic diagram of the assembly structure of the liquid cooling joint;

[0027] Figure 7 for Figure 6 A partial internal structure diagram.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Shell; 110. Inner frame; 120. Outer frame; 200. Receiving cavity; 300. Connecting groove; 400. Liquid cooling plate; 410. Protrusion; 420. Cold plate joint; 500. Liquid cooling joint; 501. Receiving groove; 510. Flow port; 520. Stepped part; 600. Refrigerant flow pipe; 700. Bottom guard plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0032] Secondly, it should be noted that in the description of this application, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0033] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] New energy vehicles aim to provide a more environmentally friendly and energy-efficient mode of transportation through advanced vehicle power control and drive technologies. These vehicles no longer rely on traditional gasoline or diesel fuels, but instead use electricity, hydrogen, or other unconventional energy sources as their primary power source. In a broad sense, new energy vehicles include all vehicles using non-petroleum fuels; in a narrower sense, they typically refer to vehicles using unconventional vehicle fuels. Among these, electric new energy vehicles are particularly widespread, and cylindrical battery cells are commonly used as the power source for them due to their advantages such as small size, stable structure, and better absorption of expansion forces.

[0036] In related technologies, the battery assembly of new energy vehicles typically includes components such as a battery casing, cell modules, and a thermal management module. The cell modules are located inside the battery casing, and the thermal management module is used to regulate the operating temperature of the cell modules. The thermal management module includes a liquid cooling plate, a liquid cooling connector, and liquid cooling pipes. The liquid cooling plate has a cold plate connector, and the liquid cooling pipes connect the cold plate connector and the liquid cooling connector. To ensure the sealing of both ends of the liquid cooling pipes, at least one seal is usually installed at the connection between the liquid cooling pipe and the cold plate connector, and at the connection between the liquid cooling pipe and the liquid cooling connector. However, the use of seals increases the number of potential sealing failure points, leading to poor sealing performance.

[0037] Based on the aforementioned technical problems, this application provides a battery assembly and a vehicle. The battery assembly includes a housing, a cell assembly, and a thermal management module. The housing has a receiving cavity, and the cell assembly is disposed within the receiving cavity. The thermal management module includes a liquid cooling plate and a liquid cooling connector. The liquid cooling plate is disposed on the bottom side of the housing and is configured to cool the cell assembly. A connecting groove is provided on the side wall of the housing, and the liquid cooling connector is inserted into the connecting groove. The liquid cooling plate has a cold plate connector, and the liquid cooling connector has a flow port opposite to the cold plate connector. The end faces of the cold plate connector and the flow port are welded together. By setting the connecting groove, the liquid cooling connector is fixed. Then, by welding the cold plate connector to the flow port on the liquid cooling connector, the liquid cooling connector and the cold plate connector are connected and fixed. The welding has a certain degree of sealing, and the sealing of the connection between the liquid cooling connector and the cold plate connector can be achieved without setting an additional sealing element, reducing the sealing failure points between the liquid cooling connector and the cold plate connector and improving the sealing effect.

[0038] It should be noted that, Figures 1 to 7 This diagram illustrates a simplified schematic of the battery pack and various components within the vehicle. The specific structures of the battery pack and other components in the vehicle are not limited to these examples. Figures 1 to 7 of examples.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings:

[0040] Reference Figures 1 to 7 As shown, this application embodiment provides a battery assembly, which includes a housing 100, a cell assembly and a thermal management module. The housing 100 has a receiving cavity 200, and the cell assembly is disposed in the receiving cavity 200.

[0041] The thermal management module includes a liquid cooling plate 400 and a liquid cooling connector 500. The liquid cooling plate 400 is disposed on the bottom side of the housing 100 and is configured to cool the battery cell assembly.

[0042] Here, the liquid cooling plate 400 is existing technology in the relevant field, and the specific usage method of the liquid cooling plate 400 is not limited in the embodiments of this application.

[0043] The side wall of the housing 100 is provided with a connecting groove 300, and the liquid cooling connector 500 is inserted into the connecting groove 300.

[0044] The liquid cooling plate 400 has a cold plate joint 420, and the liquid cooling joint 500 has a flow port 510 opposite to the cold plate joint 420; the end faces of the cold plate joint 420 and the flow port 510 are welded together.

[0045] In the above embodiment, the liquid cooling connector 500 and the housing 100 are fixed by the connection groove 300. Then, the liquid cooling connector 500 and the cold plate connector 420 are connected by welding to the flow port 510 on the liquid cooling connector 500. This connection and fixation between the liquid cooling connector 500 and the cold plate connector 420 is achieved. The welding has a certain degree of sealing, and the sealing at the connection position of the liquid cooling connector 500 and the cold plate connector 420 can be achieved without the need for additional sealing components. This reduces the sealing failure points between the liquid cooling connector 500 and the cold plate connector 420 and improves the sealing effect.

[0046] In one possible implementation, the sidewall of the liquid cooling connector 500 has a stepped portion 520, which abuts against the edge of the connecting groove 300; the edge of the stepped portion 520 is welded to the outer wall of the housing 100.

[0047] It is understandable that by providing the stepped portion 520 and welding it to the outer wall of the housing 100, the liquid cooling connector 500 is fixed relative to the housing. In addition, the stepped portion 520 has a certain limiting effect on the insertion of the liquid cooling connector 500 into the connecting groove 300, preventing the liquid cooling connector 500 from being inserted too deeply into the connecting groove 300, so as to avoid maintenance difficulties.

[0048] Furthermore, the liquid-cooled connector 500 has a receiving groove 501 on the side facing the liquid-cooled plate 400, and the edge of the liquid-cooled plate 400 has a protrusion 410 located in the receiving groove 501; the protruding edge is welded to the edge of the receiving groove 501 to form a first weld. Specifically, the receiving groove 501 can be a long strip groove or a circular groove, and the protrusion 410 can be a long strip or a circular piece corresponding to the shape of the receiving groove 501 to improve the fit between the protrusion 410 and the receiving groove 501 and facilitate the completion of the first weld. Of course, the receiving groove 501 and the protrusion can also be set to other reasonable shapes. In the attached figure, the receiving groove 501 is a long strip groove and the protrusion 410 is a long strip. This setting facilitates the processing of the receiving groove 501.

[0049] By setting the receiving groove 501 and the protrusion, on the one hand, it is convenient to connect the liquid cooling joint 500 with the liquid cooling plate 400 to facilitate the completion of the first weld, and does not interfere with the effect of other structures of the liquid cooling plate 400. On the other hand, the protrusion 410 set in the receiving groove 501 has a certain positioning function, restricts the installation position of the liquid cooling joint 500, and facilitates the accurate installation of the liquid cooling joint 500.

[0050] To improve the connection stability between the liquid cooling plate 400 and the housing 100, refer to Figure 2 As shown, the edge of the liquid cooling plate 400 is welded to the edge of the housing 100 to form a second weld.

[0051] The two ends of the first weld are connected to the second weld respectively, forming an annular sealing structure that surrounds the shell 100 degrees.

[0052] By setting a second weld and connecting the first and second welds, the sealing performance between the housing 100 and the liquid cooling plate 400 can be improved, forming a circumferential sealing structure around the housing 100. Furthermore, the stability of the first weld can be improved, preventing it from failing due to external factors such as vibration.

[0053] It should be noted that at least one of the first and second welds is brazed. Brazing uses a filler metal with a melting point lower than that of the workpiece. During heating, the filler metal melts and uses capillary action to fill and connect the gaps in the solid workpiece, thereby achieving a strong connection. This is beneficial for improving the connection stability between the liquid-cooled joint 500 and the liquid-cooled plate 400. Furthermore, brazing allows for overall heating, completing multiple welds at once, resulting in higher production efficiency compared to other welding methods that are completed step-by-step. Brazing allows the first and second welds to be completed in one operation.

[0054] Furthermore, the cold plate joint 420 and the flow port 510 can also be brazed, and the stepped portion 520 is brazed to the outer wall of the housing 100.

[0055] In another possible implementation, refer to Figure 5 As shown, the housing 100 includes an inner frame 110 and an outer frame 120, with the outer frame 120 surrounding the outer side of the inner frame 110.

[0056] The end face of the inner frame 110 facing the liquid cooling plate 400 is lower than the end face of the outer frame 120 facing the liquid cooling plate 400.

[0057] The edge of the liquid cooling plate 400 is recessed onto the end face of the inner frame 110.

[0058] In this way, by setting the end face of the inner frame 110 facing the liquid cooling plate 400 to be lower than the end face of the outer frame 120 facing the liquid cooling plate 400, it is equivalent to setting a groove around the perimeter of the housing 100 that can support the edge of the liquid cooling plate 400. This provides positioning and support for the installation of the liquid cooling plate 400, thereby improving the installation stability of the liquid cooling plate 400.

[0059] On the other hand, the edge of the liquid cooling plate 400 is recessed onto the end face of the inner frame 110, preventing the liquid cooling plate 400 from protruding beyond the outer side of the housing 100 and avoiding interference with other components in the vehicle, thus facilitating the overall installation of the battery assembly. Furthermore, multiple first connection holes can be formed on the end face of the inner frame 110, and multiple second connection holes are correspondingly formed on the edge of the liquid cooling plate 400. This allows the liquid cooling plate 400 to strengthen its connection with the housing 100 through the first and second connection holes, further improving the installation stability of the liquid cooling plate 400. Alternatively, the liquid cooling plate 400 can also be quickly positioned using positioning pins through the first and second connection holes, facilitating its installation.

[0060] Furthermore, the connecting groove 300 includes a first groove and a second groove. The first groove is located on the outer frame 120, and the second groove is located on the inner frame 110. The first groove and the second groove are in communication. The liquid cooling connector 500 is inserted into the first groove, and the flow port 510 protrudes into the second groove.

[0061] In practice, the projection of the second groove toward the first groove is located inside the first groove, and the first groove and the second groove form a T-shaped groove. During the process of the liquid cooling connector 500 being inserted into the connecting groove 300, the connecting port is first set in the second groove, and the end face of the liquid cooling connector 500 facing the second groove abuts against the outer wall of the inner frame 110, which is equivalent to having a certain positioning effect on the installation of the liquid cooling connector 500 and improving the installation stability of the liquid cooling connector 500.

[0062] In one possible implementation, the liquid cooling connector 500 protrudes at least partially outside the connecting groove 300, and the side of the liquid cooling connector 500 facing the outside of the housing 100 is provided with a refrigerant flow pipe 600, which extends away from the housing 100; the refrigerant flow pipe 600 is connected to the flow port 510.

[0063] In this way, by setting the liquid cooling connector 500 to protrude at least partially outside the connecting groove 300, the installation of the refrigerant flow pipe 600 can be facilitated, interference between the refrigerant flow pipe 600 and the housing 100 can be avoided, and the maintenance of the refrigerant flow pipe 600 can be facilitated.

[0064] Furthermore, the refrigerant flow pipe 600 includes a refrigerant inlet pipe and a refrigerant outlet pipe, which are arranged in parallel and spaced apart; both the refrigerant inlet pipe and the refrigerant outlet pipe are perpendicular to the side wall of the housing 100.

[0065] By setting the refrigerant inlet and outlet pipes parallel and spaced apart, interference between them can be avoided. This means that the refrigerant inlet and outlet pipes need to be connected to the refrigerant circulation unit in the thermal management system. Setting them parallel prevents interference when connected to the refrigerant circulation unit. The refrigerant circulation unit can be the refrigerant pump in the thermal management module; however, this application does not limit the specific structure of the refrigerant pump.

[0066] In another possible implementation, the battery assembly includes a bottom protective plate 700 connected to the side of the liquid cooling plate 400 opposite to the housing 100. The projection of the bottom protective plate 700 in the thickness direction of the housing 100 covers the liquid cooling plate 400. In this way, the bottom protective plate 700 can cover the liquid cooling plate 400, providing protection for the liquid cooling plate 400, improving its safety, and extending its service life.

[0067] This application also provides a vehicle including the above-described battery assembly. By providing the above-described battery assembly, the sealing performance of the battery assembly in the vehicle can be improved, and the sealing failure points of the vehicle can be reduced.

[0068] The implementation principle of a battery assembly and vehicle according to an embodiment of this application is as follows: The battery assembly includes a housing 100, a cell assembly, and a thermal management module. The housing 100 has a receiving cavity 200, and the cell assembly is disposed in the receiving cavity 200. The thermal management module includes a liquid cooling plate 400 and a liquid cooling connector 500. The liquid cooling plate 400 is disposed on the bottom side of the housing 100 and is configured to cool the cell assembly. The side wall of the housing 100 is provided with a connecting groove 300, and the liquid cooling connector 500 is inserted into the connecting groove 300. The liquid cooling plate 400 has a cold plate connector 420, and the liquid cooling connector 500 has a flow port 510 opposite to the cold plate connector 420. The end face of the cold plate connector 420 is welded to the flow port 510. The liquid cooling connector 500 is fixed by setting the connecting groove 300, and then the liquid cooling connector 500 and the cold plate connector 420 are connected by welding the cold plate connector 420 to the flow port 510 on the liquid cooling connector 500. This achieves the connection and fixation of the liquid cooling connector 500 and the cold plate connector 420. The welding has a certain degree of sealing, and the connection between the liquid cooling connector 500 and the cold plate connector 420 can be sealed without the need for additional sealing components. This reduces the sealing failure points between the liquid cooling connector 500 and the cold plate connector 420 and improves the sealing effect.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery assembly, characterized in that, The battery assembly includes a housing (100), a cell assembly, and a thermal management module. The housing (100) has a receiving cavity (200), and the cell assembly is disposed within the receiving cavity (200). The thermal management module includes a liquid cooling plate (400) and a liquid cooling connector (500). The liquid cooling plate (400) is disposed on the bottom side of the housing (100), and the liquid cooling plate (400) is configured to cool the cell assembly. The side wall of the housing (100) is provided with a connecting groove (300), and the liquid cooling connector (500) is inserted into the connecting groove (300); the liquid cooling plate (400) has a cold plate connector (420), and the liquid cooling connector (500) has a flow port (510) opposite to the cold plate connector (420); the end face of the cold plate connector (420) is welded to the flow port (510).

2. The battery assembly according to claim 1, characterized in that, The sidewall of the liquid cooling connector (500) has a stepped portion (520), which abuts against the edge of the connecting groove (300); the edge of the stepped portion (520) is welded to the outer wall of the housing (100).

3. The battery assembly according to claim 1, characterized in that, The liquid cooling connector (500) has a receiving groove (501) on the side facing the liquid cooling plate (400), and the edge of the liquid cooling plate (400) has a protrusion (410) located in the receiving groove (501); the protruding edge is welded to the edge of the receiving groove (501) to form a first weld.

4. The battery assembly according to claim 3, characterized in that, The edge of the liquid cooling plate (400) is welded to the edge of the housing (100) to form a second weld; the two ends of the first weld are respectively connected to the second weld and form an annular sealing structure around the circumference of the housing (100).

5. The battery assembly according to any one of claims 1-4, characterized in that, The housing (100) includes an inner frame (110) and an outer frame (120), the outer frame (120) being arranged around the outside of the inner frame (110); the end face of the inner frame (110) facing the liquid cooling plate (400) is lower than the end face of the outer frame (120) facing the liquid cooling plate (400); the edge of the liquid cooling plate (400) is recessed on the end face of the inner frame (110).

6. The battery assembly according to claim 5, characterized in that, The connecting groove (300) includes a first groove and a second groove. The first groove is located on the outer frame (120), and the second groove is located on the inner frame (110). The first groove and the second groove are in communication. The liquid cooling connector (500) is inserted into the first groove, and the flow port (510) protrudes into the second groove.

7. The battery assembly according to any one of claims 1-4, characterized in that, The liquid cooling connector (500) protrudes at least partially outside the connecting groove (300), and a refrigerant flow pipe (600) is provided on the side of the liquid cooling connector (500) facing the outside of the housing (100), and the refrigerant flow pipe (600) extends away from the housing (100); the refrigerant flow pipe (600) is connected to the flow port (510).

8. The battery assembly according to claim 7, characterized in that, The refrigerant flow pipe (600) includes a refrigerant inlet pipe and a refrigerant outlet pipe, which are arranged parallel to each other and spaced apart; both the refrigerant inlet pipe and the refrigerant outlet pipe are perpendicular to the side wall of the housing (100).

9. The battery assembly according to any one of claims 1-4, characterized in that, The battery assembly includes a bottom protective plate (700) connected to the side of the liquid cooling plate (400) away from the housing (100), and the projection of the bottom protective plate (700) in the thickness direction of the housing (100) covers the liquid cooling plate (400).

10. A vehicle, characterized in that, Includes the battery assembly as described in any one of claims 1-9.

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